Axiom has made reliability the cornerstone of its product strategy and the company is dedicated to exceeding the industry standard when it comes to detail, quality and consistency. Offering perhaps the broadest line of upgrade products in the industry, Axiom manufactures and distributes virtually every type of memory modules available.??This memory is designed for IBM Netfinity 3500 M20 8657-21Y, M20 8657-22Y, M20 8657-31Y, M20 8657-32Y, M20 8657-41Y, M20 8657-42Y; IBM Netfinity 4000R 8652-31Y, 8652-41Y, 8652-42Y, 8652-43Y, 8652-44Y, 8652-51Y, 8652-61Y, 8652-62Y, 8652-63Y, 8652-64Y; IBM Netfinity 4500R 8656-1RY, 8656-2RY, 8656-3RY, 8656-4RY, 8656-5RY; IBM Netfinity 5100 8658-11Y, 8658-1RY, 8658-21Y, 8658-2RY, 8658-31Y, 8658-3RY, 8658-41Y, 8658-4RY, 8658-51Y, 8658-5RY; IBM xSeries 230 8658-61Y, 8658-6RY.